Walter hunt



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WALTER HUNT, OF NEW YORK, N. Y., ASSIGNOR TO GEO. D. STRONG AND JONATHANDODGE, OF NEW YORK, N. Y.

. MACHINE FOR CUTTING NAILS, BRADS, 86C.

Specification of Letters Patent No. 1,853, dated November 13, 1840.

To all whom t may concern.'

Be it known that I, IVAL'mR HUNT, of the city and county and State ofNew York, have invented a new and useful Improvement in Machines forCutting Nails, Brads, &c., and that the following is a a full andaccurate description of said machine.

Figure 1 in the annexed drawings, gives a perspective, general view ofsaid machine.

The frame A which is an oblong square may be made of wood, or of castiron; upon said frame is firmly secured by bolts or otherwise, a castiron forrn B, made in one piece with enlargements upon the side railswhich form two standards, one upon each 0fV the same at C O, whichstandards are placed opposite to each other. Through these standards,are four perforations, two in each, one over the other, ranging inparallel lines, at right angles across said form. In these perforationsare inserted four mandrels or centers, two of which are shown in Fig. 1at D D, and which are forced out, and in, by the regulating screws E theheads of which run in cross slots in said centers, which centers aresecured, by two, or four wedges entered between the same, upon theoutsides and insides of said standards; one of which is shown at F inFig. 1. Upon said centers D are suspended the head levers G G which arepartially shown in Fig. 1 and more fully exhibited in the sectional Adra-wings Fig. 2. These levers are made of wrought or cast metal andcorrespond in length with the opening in the standard form in which,they reciprocate upon said centers, similar to the walking beam of asteam engine, the motion being given by the crank H upon the horizontalshaft of the fly-wheel I which shaft runs in a box, or boxes, 9 in theframe A. From said crank, the motion is communicated to said levers bythe pitman K the upper end` of which has a strap joint upon the pin orbolt which connects the ends of the bottoni lever, or levers, at L.These said levers may be made in two pieces, cast entire or in fourslabs united in pairs as in Fig. 2 by bolts 7L 71. h 7L Fig. 3 whichpass into, or through studs or spreaders at M, M, M, M, two in each pairof levers, placed equi-distant from the centers, upon which saidcenters, the levers reciprocate. These spreaders are turned square upontheir ends, which it into circular mortises, countersunk\ in the innerfaces of said levers, as shown in they sectional drawing F ig. 2 lettersN, N, N, N.

In the inside faces of said levers are circular grooves in which areinserted the tennons of the cut-ters, which are four in number, an endview of which is given in drawing 2 at O, P, Q, R where two of saidlevers are removed in order to show the position, and manner of securingsaid cutters, which is effected by check-screws S, S, S, S which passthrough studs T T T T the ends of which studs, are inserted in saidlevers nearly opposite to the back of said cutters and parallel with thesame, at T T T T. These cutters are formed in the first place into caststeel zones or thimbles see Figs, 6, 7, which are nicely turned in alathe with tennons upon the ends 7c, f. The surface or peripheries ofthese thimbles, are made tapering in three grades or elevations with twodeclivities or angles near each end which angles, form the heads andpoints of the brads, &c., in the process of cutting the same, and whenthe butts, or largest ends of two of these thimbles are placed together(the centers being parallel) the space left in consequence of the taperand angles between said cutters will precisely describe the v form ofthe nail or brad, which they are designed to cut. For example, if awedgehead and pointed nail is required, as shown at O Fig. 8 the thimble ismade with obtuse angles as in Fig. 7, and for a curved T head and roundor bead pointas in Fig. 9, letter P, the angles are reverse curved, asin Fig. 6; and for a square T head and square point, as in Fig. lOletterQ the angles on said thimbles are made right angles as in Fig. 5.

The Figs. 8, 9, 10, exhibit pieces of nail plates with three differentforms of nails or brads adjoining as above described, and also the linesin which the same are separated from said plates.

In order to form the above described thimbles into cutters, they aresawed lengthwise into four sections, or staves, 'each pair of which,being reversed, formsrone set of cutters, see Fig. 11, letters Q, P, andthe other two quarters form the other set; these cutters are inserted,two in each pair of levers, through openings cut for the purpose,opposite to the circular grooves at r, 1, and are situated as follows,(see sectional draw ing Fig. 2, letters O, l?, Q, R,). P in the upperlever at the right hand is mate to Q, the left hand cutter on the bottomlever; and R, the right hand cutter, in the bot-- tom lever, is mate toO, in the upper lever, at the left hand. Thus it will be seen that theup and down motion of the pitman end of these levers, will alternatelybring the cutting edges of Q, and P, and of O, and R; in close contactpast each other, operating as cylindrical shears between which, the nailplate V, (which is shown in the drawing Fig. 2,) would be separated inlines corresponding with those of the cutting edges of said cutters, andconsequently if the nail, plate V, is inserted precisely the depth ofthe taper of the cutter, or depth of the nail to be cut, at eachvibration of the levers, upon the centers D, D, D, D, aforesaid; aperfect nail, or brad, will be produced.

'Ihe nail plate may be introduced by hand, with tongs, or by aregulating screw (or otherwise) through the plate-guide W, which issecured to a standard placed verti cally upon the form B, at C, directlyopposite to the cutters, before described. Said plate-guide is a gutterof sheet, or plate iron, standing directly over and the bo-ttom end ofwhich enters between the two upper cutters, as seen at V, V, Fig. 2.

The introduction of the nail plate, or the width of the nail, isregulated by a nailgage, the end of which is seen in Fig. 2 at Z, butmore fully exhibited in Fig. 3, letter Z. It is formed of a long flatspring secured at Vone end by the nut X, upon the end of the pitmanbolt, and at the other end is bent at right angles, and passes betweenthe two bottom cutters, a suflicient distance to catch the corner of thenail plate as it is pressed down in the process of cutting; thisconstitutes the nail gage and which is thrown back in time to let thenail drop between the reciprocation of the levers, by means of a spur Ywhich projects upward, from near the gage end of said spring which spurfits into a notch or depression cut in the lower edge of the upperopposite lever, at J, J, the limits orbanks of which depression, operateas combs upon said spur in throwing back said spring` at everyreciprocation of the levers as aforesaid.

The two bottom centers, upon which are suspended the lower levers, areinserted in movable head-blocks, fitted in openings in said standards atM, Fig. 1, and are raised, or `depressed by check-screws, underneatheach one of which is seen at Q` Q. These head blocks are cast withflanches upon the insides, by which they are secured to said standardsby bolts and nuts, I I which pass horizontally through each, and bywhich means thecutters may be adjusted with required accuracy. Thepitman ends of said levers are connected by means of two stirrups orlinks, N, N, and their motions when. in operation are similar to that ofa parallel rule, supposing one of the straps to be held firm in avertical position and a reciprocating motion given to the other end ofthe rule.

As before mentioned, I have anticipated casting these levers in twopieces, instead of four as herein above described in which case openingswill be cast for inserting the cutters, and directly back of which, theywill be contracted each to one arm, tapering to the pitman ends whichmay be connected similar to those above described. I have alsoanticipated the casting of the frame and standards in one piece similarto the standing head of a large lathe, in the standard of which, mycenters may be inserted and between which my levers may be suspendedsimilar to the plan above `specified and in which case an opening may becast in the base which may project from the feet of said standards whichopening makes room for the play of the crank, upon the shaft of thefly-wheel, which shaft may run in boxes or plummer blocks, cast on orbolted to said base.

Either of the two arrangements of this plan of a machine may be made tooperate in a horizontal, vertical or in an inclined position, and thenail plate introduced by hand with tongs, or by means of a gage screw,feeding rollers, or otherwise.

In the above specified machine, my claims as inventor, are as follows,and not otherwise:

l. I claim the plan of forming the cutters for cutting nails, brads,&c., from staves, or longitudinal sections of metal zones or thimbles,in the form, or forms above specified, whether the same are rst made orturned in entire pieces and afterward cut, or sawed into sections, orwhether said sections are fitted up separate, or made of cast steel, orother metal.

. 2. I also claim in connectionV with said above described cutters orthose of any other form, having similar shaped cutting surfaces, oredges, the mode of arranging the same, in such manner asto operate uponthe same principle of motion, (that is to say,) arranged in two oppositepairs, fitted in levers, or other fastenings, by the vibrating motion ofwhich levers, two opposite cutters, one from each pair, is made toapproximate, and pass each other, operating as cylindrical shears, incutting off one nail, and as these cutters recede, the other pairoperate in a similar manner in cutting the next nail alternately.

3. And I further claim the combination, out regard to the particularform or shape and genera arrangement of the head-levers, of the same.cutters, anc spring-gage Constructed and zu'- mng'ed as above set forthand described., WALTER HUNT 5 Without reference t0 the particular formof Witnesses:

the cutting; edges of the Cutters; for the pur- B. H. MORSELL, pose ofcutting nails, brads, tacks, &C., Wth- EDMUND MAHER.

